Does a Praying Mantis sleep?

Relatively little research has been carried out on sleep in insects and I
did not find anything specific to the Praying Mantis. However, sleep or
something like it has been documented in many insects and I think it is
fair to say that mantids probably sleep as well. Some great answers have
already been posted on the web about this and I am putting links to the
useful ones below.
The
Evolution of Sleep by Irene Tobler

For mantids, defence while "sleeping" is probably not much of an issue.
When they are awake, their normal method of defence is camouflage and
remaining still. They can continue to do this in their sleep.

Even when mantids do move because they are disturbed, they seem to avoid
flying, which is an energy-demanding activity. My point here is that
mantids do not need to warm themselves up to same extent as insects that
regularly use flight to avoid predators.

I have observed butterflies,
which I disturbed, to spend time warming themselves up before take-off.
This is a time of vulnerability. For
this reason, remaining motionless and camouflage are some of the best
strategies used by insects to avoid predators.

In any case, mantids probably sleep at night when they cannot hunt for
food. A resting mantis would probably not have any predators during this
time. Only if they are flying would they be preyed upon by bats and an ear
has been found in at least one species that enables them to detect a bat's
echolocation system.

Mantids have formidable spines on their forelegs that they use for grasping
prey. To some extent, these can be used to protect themselves against
predators. You will
soon find out about these spines if you handle your mantis carelessly.

Around the world, mantids provide some of the most spectacular forms of
camouflage in the animal kingdom. They have many other fascinating
attributes and I think you will enjoy watching them.